What is the most optimal and neatest way to replace keys in a hash given a particular condition?
I'm currently using delete_if and putting replacement values into a new hash before merging them back into the original hash. Another approach would to simply rebuild a whole new hash.
# Contrived example: given searchReplacePairs hash of { search => replace } pairs,
# convert any String keys to a Regexp.
newPairs = { }
searchReplacePairs.delete_if do |search, replace|
if search.class == String
newPairs[Regexp.new(search)] = replace
end
end
searchReplacePairs.merge! newPairs
Many thanks,
Alex